Technical description and composition of the SAMSUNG UE32N4500AU TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32N4500AU
Chassis / Version: UN4300
Panel: CY-JN032AGLR1V
LED backlight: LM41-00616A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): A5919_FSM Adapter 19V 3.17A
MainBoard: BN41-02663A BN94-13043Z
IC MainBoard: SPI Flash: 25Q40, EEPROM: 24C512
Tuner: BN40-00331B
Control: Wi-Fi: BN59-01174D WIDT30Q, Remote: BN59-01303A
Technical Specifications UE32N4500AU
SAMSUNG UE32N4500AU
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE32N4500AU does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With such manifestations, a malfunction is most likely to be detected in the A5919_FSM power supply module.
This TV model is equipped with an external power supply unit such as A5919_FSM Adapter 19V 3.17A, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes some sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of the power switches and rectifier diodes for a possible breakdown (short circuit).
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
In such cases, the most likely malfunction of the backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN-junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-02663A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its SPI Flash chips: 25Q40, EEPROM: 24C512 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00331B. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention! Users and owners of UE32N4500AU TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
The appearance of the MainBoard BN41-02663A is shown in the figure below:BN41-02663A
The appearance of the power supply
Main features of the SAMSUNG UE32N4500AU device:
Installed matrix (LED panel) CY-JN032AGLR1V.
To power the backlight LEDs, a converter is used, combined with the main board BN41-02663A.
An external source of the A5919_FSM Adapter 19V 3.17A type is used to power all internal nodes of the SAMSUNG UE32N4500AU TV.
MainBoard - the main board (motherboard) is a BN41-02663A module, using SPI Flash chips: 25Q40, EEPROM: 24C512 and others.
The tuner BN40-00331B provides the reception of television programs and tuning to channels.
